package com.imooc.ad.advice;

import com.imooc.ad.annotation.IgnoreResponseAdvice;
import com.imooc.ad.vo.CommonResponse;
import org.springframework.core.MethodParameter;
import org.springframework.http.MediaType;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.server.ServerHttpRequest;
import org.springframework.http.server.ServerHttpResponse;
import org.springframework.lang.Nullable;
import org.springframework.web.bind.annotation.RestControllerAdvice;
import org.springframework.web.servlet.mvc.method.annotation.ResponseBodyAdvice;

/**
 * Created byFengGuoXing  DATE:19-1-30 01:15
 */
@RestControllerAdvice
public class CommonResponseDataAdvice implements ResponseBodyAdvice <Object>{

    @Override
    @SuppressWarnings("all")//隐藏
    //这两种情况不需要经过common处理
    public boolean supports(MethodParameter methodParameter, Class<? extends HttpMessageConverter<?>> aClass) {

        if(methodParameter.getDeclaringClass().isAnnotationPresent(IgnoreResponseAdvice.class)){
            return false;
        }
        if(methodParameter.getMethod().isAnnotationPresent(IgnoreResponseAdvice.class)){
            return false;
        }
        return true;
    }

    @Override
    @SuppressWarnings("all")//隐藏
    public Object beforeBodyWrite(Object o, MethodParameter methodParameter, MediaType mediaType, Class<? extends HttpMessageConverter<?>> aClass, ServerHttpRequest serverHttpRequest,
                                  ServerHttpResponse serverHttpResponse) {
        CommonResponse<Object>response =new CommonResponse<>(0,"");
        if(null==o){
            return response;
        }else if(o instanceof CommonResponse){
            response = (CommonResponse<Object>)o;
        } else {
            response.setData(o);
        }

        return response;
    }
}